Since there's a "worst" game you've played this year thread, here's a positive one!
Basicly, out of all the games you've played this year... Which was the best, in your opinion. (We all have different opinions)...
As for myself... Personally, Rock Band 3 mainly because I'm a huge music person (Always have music playing unless I'm watching a show) and the game idea is so simple that it's hard to ruin. Plus, even though I have it on the 360, can still get player-made customs into the game for free and allow more 'personal tastes' into it... So, all-in-all it is my most played game cause can't really get bored of it personally.
As for honorable mentions...
Minecraft would be one just cause I have a creative mind and I simply love the freedom of the whole "sandbox"...
And Skyrim. Skyrim is, so far, my favorite Elder Scrolls game and is also the only one I can actually fully enjoy without mods... {Arena I don't enjoy at all due to the limits. Daggerfall is glitchy as heck and required quite a bit of unofficial fixes. Morrowind has a mess of EXTREME annoyances that I HAVE TO MOD just to play the game, let alone enjoy it... Oblivion is just a mess of all sorts of stuff (Mostly crap and comedy)}.